<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 200px;
            height: 200px;
            padding: 70px;
            border: 10px solid #000;
        }
        header{
            height: 1000px;
        }
    </style>
</head>
<body>
    <div>
        这是div的内容
    </div>
    <header></header>
    <script>
        var div = document.querySelector("div");
        console.log(div.offsetWidth); //360  content+border+padding
        console.log(div.offsetHeight); //360

        console.log(div.clientWidth); //340 content + padding
        console.log(div.clientHeight);

        console.log(div.scrollWidth); //340 content + padding
        console.log(div.scrollHeight);

        // console.log(div.width);
        // console.log(div.style.width); //

        
        console.log(div.getBoundingClientRect()); //{width,}


        var body = document.body; //获取body
        var html = document.documentElement; //获取html

        console.log(html.offsetHeight); //1376  //文档的高度
        console.log(html.clientHeight); //821   //浏览器视图窗口的高度
        console.log(body.offsetHeight); //1360
        console.log(body.clientHeight); //1360

        console.log(window.innerWidth); //浏览器视图窗口的宽
        console.log(window.innerHeight);//浏览器视图窗口的高

        console.log(window.screen.width); //获取屏幕的大小
        console.log(window.screen.height);


    </script>
</body>
</html>